package com.lkbaby.home.util;

import java.security.MessageDigest;

public class MD5Utils {

	/***
	 * MD5加码 生成32位md5码
	 */
	public static String string2MD5(String inStr) {
		MessageDigest md5 = null;
		try {
			md5 = MessageDigest.getInstance("MD5");
		} catch (Exception e) {
			e.printStackTrace();
			return "";
		}
		char[] charArray = inStr.toCharArray();
		byte[] byteArray = new byte[charArray.length];

		for (int i = 0; i < charArray.length; i++) {
			byteArray[i] = (byte) charArray[i];
		}
		byte[] md5Bytes = md5.digest(byteArray);
		StringBuffer hexValue = new StringBuffer();
		for (int i = 0; i < md5Bytes.length; i++) {
			int val = ((int) md5Bytes[i]) & 0xff;
			if (val < 16) {
				hexValue.append("0");
			}
			hexValue.append(Integer.toHexString(val));
		}
		return hexValue.toString();

	}

	/**
	 * 加密解密算法 执行一次加密，两次解密
	 */
	public static String convertMD5(String inStr) {

		char[] a = inStr.toCharArray();
		for (int i = 0; i < a.length; i++) {
			a[i] = (char) (a[i] ^ 't');
		}
		String s = new String(a);
		return s;

	}

	/**
	 * 判断输入的密码和数据库中保存的MD5密码是否一致
	 *
	 * @param inputPassword 输入的密码
	 * @param md5DB         数据库保存的密码
	 * @return
	 */
	public static boolean passwordIsTrue(String inputPassword, String md5DB) {

		String md5 = string2MD5(inputPassword);
		return md5DB.equals(md5);
	}

	// 测试主函数
	public static void main(String args[]) {
		String s = new String("luyy@123");
		System.out.println("原始：" + s);
		System.out.println("MD5后：" + string2MD5("luyy@123"));
		System.out.println("密码是否一致：" + passwordIsTrue("luyy@123", "50d275168a3057d4a9e31dccc9ae72e5"));
	}

}
